# score = eval(input("请输入成绩分数"))
# if 60 <= score < 80:
#     print("合格啦，老弟")
#     if 80 <= score <100:
#         print("太棒啦")
# else:
#     print("什么玩意")
################################
# score = eval(input("输入："))
# if score >= 60:
#     print("简简单单")
#     if score >= 90:
#         print("可以撒")
#     else:
#         print("怎么个事")
################################
# score = eval(input("请输入："))
# if score >= 60:
#     print("成绩及格")
#     if score >= 90:
#         print("成绩很好")
#     else:
#         print("成绩一般")
# else:
#     print("成绩不合格")
#     if score < 30:
#         print("成绩较差")
#     else:
#         print("成绩较差")
################################
# score = eval(input("请输入："))
# if score >= 90:
#     print("成绩优秀")
# elif score >= 80:
#     print("成绩良好")
# elif score >= 70:
#      print("成绩中等")
# if score >= 60:
#      print("成绩较好")
# else:
#     print("成绩不合格")
################################
score = eval(input("请输入："))
if score % 4 == 0 and score % 100 != 0 or score % 400 == 0:
    print("是闰年")
else:
    print("不是闰年")